source/backends/vulkan/pipelinestate_backend.cpp

   1 #include <msp/core/algorithm.h>
   2 #include <msp/core/hash.h>
   3 #include "batch.h"
   4 #include "blend.h"
   5 #include "buffer.h"
   6 #include "depthtest.h"
   7 #include "device.h"
   8 #include "framebuffer.h"
   9 #include "pipelinestate.h"
  10 #include "pipelinestate_backend.h"
  11 #include "program.h"
  12 #include "rect.h"
  13 #include "sampler.h"
  14 #include "stenciltest.h"
  15 #include "structurebuilder.h"
  16 #include "texture.h"
  17 #include "uniformblock.h"
  18 #include "vertexsetup.h"
  19 #include "vulkan.h"
  20
  21 using namespace std;
  22
  23 namespace Msp {
  24 namespace GL {
  25
  26 VulkanPipelineState::VulkanPipelineState():
  27         device(Device::get_current())
  28 { }
  29
  30 VulkanPipelineState::VulkanPipelineState(VulkanPipelineState &&other):
  31         device(other.device),
  32         handle(other.handle)
  33 { }
  34
  35 void VulkanPipelineState::update() const
  36 {
  37         const PipelineState &self = *static_cast<const PipelineState *>(this);
  38
  39         unapplied |= changes&(PipelineState::VIEWPORT|PipelineState::SCISSOR|PipelineState::VERTEX_SETUP);
  40
  41         if(changes&PipelineState::VERTEX_SETUP)
  42                 self.vertex_setup->refresh();
  43
  44         constexpr unsigned pipeline_mask = PipelineState::SHPROG|PipelineState::VERTEX_SETUP|PipelineState::FACE_CULL|
  45                 PipelineState::DEPTH_TEST|PipelineState::STENCIL_TEST|PipelineState::BLEND|PipelineState::PRIMITIVE_TYPE;
  46         if(changes&pipeline_mask)
  47         {
  48                 handle = device.get_pipeline_cache().get_pipeline(self);
  49                 unapplied |= PipelineState::SHPROG;
  50         }
  51
  52         if(changes&(PipelineState::SHPROG|PipelineState::UNIFORMS|PipelineState::TEXTURES))
  53         {
  54                 unsigned changed_sets = (changes&PipelineState::SHPROG ? ~0U : 0U);
  55                 for(const PipelineState::BoundUniformBlock &u: self.uniform_blocks)
  56                         if(u.changed || changed_sets==~0U)
  57                         {
  58                                 if(u.block)
  59                                         u.used = self.shprog->uses_uniform_block_binding(u.binding);
  60                                 if(u.binding>=0)
  61                                         changed_sets |= 1<<(u.binding>>20);
  62                                 u.changed = false;
  63                         }
  64                 for(const PipelineState::BoundTexture &t: self.textures)
  65                         if(t.changed || changed_sets==~0U)
  66                         {
  67                                 if(t.texture && t.sampler)
  68                                         t.used = self.shprog->uses_texture_binding(t.binding);
  69                                 changed_sets |= 1<<(t.binding>>20);
  70                                 if(t.texture && t.level>=0)
  71                                         t.texture->refresh_mip_views();
  72                                 if(t.sampler)
  73                                         t.sampler->refresh();
  74                                 t.changed = false;
  75                         }
  76
  77                 if(changed_sets)
  78                 {
  79                         descriptor_set_handles.resize(self.shprog->get_n_descriptor_sets());
  80                         for(unsigned i=0; i<descriptor_set_handles.size(); ++i)
  81                                 if(changed_sets&(1<<i))
  82                                         descriptor_set_handles[i] = device.get_pipeline_cache().get_descriptor_set(self, i);
  83                         unapplied |= PipelineState::UNIFORMS;
  84                 }
  85         }
  86
  87         changes = 0;
  88 }
  89
  90 uint64_t VulkanPipelineState::compute_hash() const
  91 {
  92         const PipelineState &self = *static_cast<const PipelineState *>(this);
  93         const FrameFormat &format = self.framebuffer->get_format();
  94
  95         uint64_t result = hash<64>(self.shprog);
  96         result = hash_update<64>(result, self.vertex_setup->compute_hash());
  97         result = hash_round<64>(result, self.primitive_type);
  98
  99         if(self.front_face!=NON_MANIFOLD && self.face_cull!=NO_CULL)
 100         {
 101                 result = hash_round<64>(result, self.front_face);
 102                 result = hash_round<64>(result, self.face_cull);
 103         }
 104
 105         result = hash_round<64>(result, format.get_samples());
 106
 107         if(self.depth_test.enabled)
 108         {
 109                 result = hash_round<64>(result, self.depth_test.compare);
 110                 result = hash_update<64>(result, self.depth_test.write);
 111         }
 112
 113         if(self.stencil_test.enabled)
 114         {
 115                 result = hash_round<64>(result, self.stencil_test.compare);
 116                 result = hash_round<64>(result, self.stencil_test.stencil_fail_op);
 117                 result = hash_round<64>(result, self.stencil_test.depth_fail_op);
 118                 result = hash_round<64>(result, self.stencil_test.depth_pass_op);
 119                 result = hash_update<64>(result, self.stencil_test.reference);
 120         }
 121
 122         if(self.blend.enabled)
 123         {
 124                 result = hash_round<64>(result, self.blend.equation);
 125                 result = hash_round<64>(result, self.blend.src_factor);
 126                 result = hash_round<64>(result, self.blend.dst_factor);
 127                 result = hash_round<64>(result, self.blend.write_mask);
 128         }
 129
 130         for(FrameAttachment a: format)
 131                 result = hash_update<64>(result, a);
 132
 133         return result;
 134 }
 135
 136 void VulkanPipelineState::fill_creation_info(vector<char> &buffer) const
 137 {
 138         const PipelineState &self = *static_cast<const PipelineState *>(this);
 139
 140         const FrameFormat &format = self.framebuffer->get_format();
 141         VkRenderPass render_pass = device.get_pipeline_cache().get_render_pass(format, false, false, false);
 142
 143         unsigned n_color_attachments = 0;
 144         for(FrameAttachment a: format)
 145         {
 146                 unsigned attach_pt = get_attach_point(a);
 147                 if(attach_pt!=get_attach_point(DEPTH_ATTACHMENT) && attach_pt!=get_attach_point(STENCIL_ATTACHMENT))
 148                         ++n_color_attachments;
 149         }
 150
 151         StructureBuilder sb(buffer, 10);
 152         VkGraphicsPipelineCreateInfo *&pipeline_info = sb.add<VkGraphicsPipelineCreateInfo>();
 153         VkPipelineInputAssemblyStateCreateInfo *&input_assembly_info = sb.add<VkPipelineInputAssemblyStateCreateInfo>();
 154         VkPipelineViewportStateCreateInfo *&viewport_info = sb.add<VkPipelineViewportStateCreateInfo>();
 155         VkPipelineRasterizationStateCreateInfo *&raster_info = sb.add<VkPipelineRasterizationStateCreateInfo>();
 156         VkPipelineMultisampleStateCreateInfo *&multisample_info = sb.add<VkPipelineMultisampleStateCreateInfo>();
 157         VkPipelineDepthStencilStateCreateInfo *&depth_stencil_info = sb.add<VkPipelineDepthStencilStateCreateInfo>();
 158         VkPipelineColorBlendStateCreateInfo *&blend_info = sb.add<VkPipelineColorBlendStateCreateInfo>();
 159         VkPipelineColorBlendAttachmentState *&blend_attachments = sb.add<VkPipelineColorBlendAttachmentState>(n_color_attachments);
 160         VkPipelineDynamicStateCreateInfo *&dynamic_info = sb.add<VkPipelineDynamicStateCreateInfo>();
 161         VkDynamicState *&dynamic_states = sb.add<VkDynamicState>(2);
 162
 163         input_assembly_info->sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO;
 164         input_assembly_info->topology = static_cast<VkPrimitiveTopology>(get_vulkan_primitive_type(self.primitive_type));
 165         input_assembly_info->primitiveRestartEnable = true;
 166
 167         viewport_info->sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO;
 168         viewport_info->viewportCount = 1;
 169         viewport_info->pViewports = 0;
 170         viewport_info->scissorCount = 1;
 171         viewport_info->pScissors = 0;
 172
 173         raster_info->sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO;
 174         raster_info->depthClampEnable = VK_FALSE;
 175         raster_info->rasterizerDiscardEnable = VK_FALSE;
 176         raster_info->polygonMode = VK_POLYGON_MODE_FILL;
 177         raster_info->frontFace = (self.front_face==CLOCKWISE ? VK_FRONT_FACE_COUNTER_CLOCKWISE : VK_FRONT_FACE_CLOCKWISE);
 178         if(self.face_cull==NO_CULL || self.front_face==NON_MANIFOLD)
 179                 raster_info->cullMode = VK_CULL_MODE_NONE;
 180         else
 181                 raster_info->cullMode = (self.face_cull==CULL_FRONT ? VK_CULL_MODE_FRONT_BIT : VK_CULL_MODE_BACK_BIT);
 182         raster_info->depthBiasEnable = VK_FALSE;
 183         raster_info->depthBiasConstantFactor = 0.0f;
 184         raster_info->depthBiasClamp = 0.0f;
 185         raster_info->depthBiasSlopeFactor = 0.0f;
 186         raster_info->lineWidth = 1.0f;
 187
 188         multisample_info->sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;
 189         multisample_info->rasterizationSamples = static_cast<VkSampleCountFlagBits>(get_vulkan_samples(format.get_samples()));
 190         multisample_info->sampleShadingEnable = VK_FALSE;
 191         multisample_info->minSampleShading = 1.0f;
 192         multisample_info->pSampleMask = 0;
 193         multisample_info->alphaToCoverageEnable = VK_FALSE;
 194         multisample_info->alphaToOneEnable = VK_FALSE;
 195
 196         depth_stencil_info->sType = VK_STRUCTURE_TYPE_PIPELINE_DEPTH_STENCIL_STATE_CREATE_INFO;
 197         depth_stencil_info->depthTestEnable = self.depth_test.enabled;
 198         depth_stencil_info->depthWriteEnable = self.depth_test.write;
 199         depth_stencil_info->depthCompareOp = static_cast<VkCompareOp>(get_vulkan_predicate(self.depth_test.compare));
 200         depth_stencil_info->depthBoundsTestEnable = VK_FALSE;
 201
 202         depth_stencil_info->stencilTestEnable = self.stencil_test.enabled;
 203         depth_stencil_info->front.failOp = static_cast<VkStencilOp>(get_vulkan_stencil_op(self.stencil_test.stencil_fail_op));
 204         depth_stencil_info->front.passOp = static_cast<VkStencilOp>(get_vulkan_stencil_op(self.stencil_test.depth_pass_op));
 205         depth_stencil_info->front.depthFailOp = static_cast<VkStencilOp>(get_vulkan_stencil_op(self.stencil_test.depth_fail_op));
 206         depth_stencil_info->front.compareOp = static_cast<VkCompareOp>(get_vulkan_predicate(self.stencil_test.compare));
 207         depth_stencil_info->front.compareMask = 0xFFFFFFFFU;
 208         depth_stencil_info->front.writeMask = 0xFFFFFFFFU;
 209         depth_stencil_info->front.reference = self.stencil_test.reference;
 210         depth_stencil_info->back = depth_stencil_info->front;
 211
 212         for(unsigned i=0; i<n_color_attachments; ++i)
 213         {
 214                 blend_attachments[i].blendEnable = self.blend.enabled;
 215                 blend_attachments[i].srcColorBlendFactor = static_cast<VkBlendFactor>(get_vulkan_blend_factor(self.blend.src_factor));
 216                 blend_attachments[i].dstColorBlendFactor = static_cast<VkBlendFactor>(get_vulkan_blend_factor(self.blend.dst_factor));
 217                 blend_attachments[i].colorBlendOp = static_cast<VkBlendOp>(get_vulkan_blend_equation(self.blend.equation));
 218                 blend_attachments[i].srcAlphaBlendFactor = blend_attachments[i].srcColorBlendFactor;
 219                 blend_attachments[i].dstAlphaBlendFactor = blend_attachments[i].dstColorBlendFactor;
 220                 blend_attachments[i].alphaBlendOp = blend_attachments[i].colorBlendOp;
 221                 blend_attachments[i].colorWriteMask = get_vulkan_color_mask(self.blend.write_mask);
 222         }
 223
 224         blend_info->sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO;
 225         blend_info->attachmentCount = n_color_attachments;
 226         blend_info->pAttachments = blend_attachments;
 227
 228         dynamic_states[0] = VK_DYNAMIC_STATE_VIEWPORT;
 229         dynamic_states[1] = VK_DYNAMIC_STATE_SCISSOR;
 230
 231         dynamic_info->sType = VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO;
 232         dynamic_info->dynamicStateCount = 2;
 233         dynamic_info->pDynamicStates = dynamic_states;
 234
 235         pipeline_info->sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
 236
 237         pipeline_info->pInputAssemblyState = input_assembly_info;
 238         pipeline_info->pTessellationState = 0;
 239         pipeline_info->pViewportState = viewport_info;
 240         pipeline_info->pRasterizationState = raster_info;
 241         pipeline_info->pMultisampleState = multisample_info;
 242         pipeline_info->pDepthStencilState = depth_stencil_info;
 243         pipeline_info->pColorBlendState = blend_info;
 244         pipeline_info->pDynamicState = dynamic_info;
 245         pipeline_info->renderPass = handle_cast<::VkRenderPass>(render_pass);
 246         pipeline_info->subpass = 0;
 247
 248         if(self.shprog)
 249         {
 250                 pipeline_info->stageCount = self.shprog->n_stages;
 251                 pipeline_info->pStages = reinterpret_cast<const VkPipelineShaderStageCreateInfo *>(self.shprog->creation_info.data());
 252                 pipeline_info->layout = handle_cast<::VkPipelineLayout>(self.shprog->layout_handle);
 253         }
 254
 255         if(self.vertex_setup)
 256                 pipeline_info->pVertexInputState = reinterpret_cast<const VkPipelineVertexInputStateCreateInfo *>(self.vertex_setup->creation_info.data());
 257 }
 258
 259 uint64_t VulkanPipelineState::compute_descriptor_set_hash(unsigned index) const
 260 {
 261         const PipelineState &self = *static_cast<const PipelineState *>(this);
 262
 263         uint64_t result = hash<64>(0, 0);
 264
 265         auto i = lower_bound_member(self.uniform_blocks, static_cast<int>(index)<<20, &PipelineState::BoundUniformBlock::binding);
 266         for(; (i!=self.uniform_blocks.end() && static_cast<unsigned>(i->binding)>>20==index); ++i)
 267                 if(i->used)
 268                 {
 269                         result = hash_update<64>(result, i->binding);
 270                         result = hash_update<64>(result, reinterpret_cast<uintptr_t>(i->block));
 271                         result = hash_update<64>(result, reinterpret_cast<uintptr_t>(i->buffer->handle));
 272                 }
 273
 274         auto j = lower_bound_member(self.textures, index<<20, &PipelineState::BoundTexture::binding);
 275         for(; (j!=self.textures.end() && j->binding>>20==index); ++j)
 276                 if(j->used)
 277                 {
 278                         result = hash_update<64>(result, j->binding);
 279                         result = hash_update<64>(result, reinterpret_cast<uintptr_t>(j->texture->handle));
 280                         result = hash_update<64>(result, reinterpret_cast<uintptr_t>(j->sampler->handle));
 281                         result = hash_update<64>(result, j->level);
 282                 }
 283
 284         return result;
 285 }
 286
 287 VkDescriptorSetLayout VulkanPipelineState::get_descriptor_set_layout(unsigned index) const
 288 {
 289         return static_cast<const PipelineState *>(this)->shprog->desc_set_layout_handles[index];
 290 }
 291
 292 unsigned VulkanPipelineState::fill_descriptor_writes(unsigned index, vector<char> &buffer) const
 293 {
 294         const PipelineState &self = *static_cast<const PipelineState *>(this);
 295
 296         auto u_begin = lower_bound_member(self.uniform_blocks, static_cast<int>(index)<<20, &PipelineState::BoundUniformBlock::binding);
 297         auto t_begin = lower_bound_member(self.textures, index<<20, &PipelineState::BoundTexture::binding);
 298
 299         unsigned n_buffers = 0;
 300         for(auto i=u_begin; (i!=self.uniform_blocks.end() && static_cast<unsigned>(i->binding)>>20==index); ++i)
 301                 if(i->used)
 302                         ++n_buffers;
 303         unsigned n_images = 0;
 304         for(auto i=t_begin; (i!=self.textures.end() && i->binding>>20==index); ++i)
 305                 if(i->used)
 306                         ++n_images;
 307         unsigned n_writes = n_buffers+n_images;
 308
 309         StructureBuilder sb(buffer, 3);
 310         VkWriteDescriptorSet *&writes = sb.add<VkWriteDescriptorSet>(n_writes);
 311         VkDescriptorBufferInfo *&buffers = sb.add<VkDescriptorBufferInfo>(n_buffers);
 312         VkDescriptorImageInfo *&images = sb.add<VkDescriptorImageInfo>(n_images);
 313
 314         VkWriteDescriptorSet *write_ptr = writes;
 315         VkDescriptorBufferInfo *buffer_ptr = buffers;
 316         VkDescriptorImageInfo *image_ptr = images;
 317
 318         for(auto i=u_begin; (i!=self.uniform_blocks.end() && static_cast<unsigned>(i->binding)>>20==index); ++i)
 319                 if(i->used)
 320                 {
 321                         buffer_ptr->buffer = handle_cast<::VkBuffer>(i->buffer->handle);
 322                         buffer_ptr->offset = i->block->get_offset();
 323                         buffer_ptr->range = i->block->get_data_size();
 324
 325                         write_ptr->sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
 326                         write_ptr->dstBinding = i->binding&0xFFFFF;
 327                         write_ptr->descriptorCount = 1;
 328                         write_ptr->descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC;
 329                         write_ptr->pBufferInfo = buffer_ptr;
 330
 331                         ++buffer_ptr;
 332                         ++write_ptr;
 333                 }
 334
 335         for(auto i=t_begin; (i!=self.textures.end() && i->binding>>20==index); ++i)
 336                 if(i->used)
 337                 {
 338                         image_ptr->sampler = handle_cast<::VkSampler>(i->sampler->handle);
 339                         if(i->level<0)
 340                                 image_ptr->imageView = handle_cast<::VkImageView>(i->texture->view_handle);
 341                         else
 342                                 image_ptr->imageView = handle_cast<::VkImageView>(i->texture->mip_view_handles[i->level]);
 343                         image_ptr->imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
 344
 345                         write_ptr->sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
 346                         write_ptr->dstBinding = i->binding&0xFFFFF;
 347                         write_ptr->descriptorCount = 1;
 348                         write_ptr->descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
 349                         write_ptr->pImageInfo = image_ptr;
 350
 351                         ++image_ptr;
 352                         ++write_ptr;
 353                 }
 354
 355         return n_writes;
 356 }
 357
 358 void VulkanPipelineState::apply(VkCommandBuffer command_buffer, const VulkanPipelineState *last, unsigned frame, bool negative_viewport) const
 359 {
 360         const PipelineState &self = *static_cast<const PipelineState *>(this);
 361         const VulkanFunctions &vk = device.get_functions();
 362
 363         if(!last)
 364                 unapplied = ~0U;
 365         else if(last!=this)
 366         {
 367                 const PipelineState &last_ps = *static_cast<const PipelineState *>(last);
 368                 if(handle!=last->handle)
 369                         unapplied |= PipelineState::SHPROG;
 370                 if(self.vertex_setup!=last_ps.vertex_setup)
 371                         unapplied |= PipelineState::VERTEX_SETUP;
 372                 for(unsigned i=0; (i<descriptor_set_handles.size() && i<last->descriptor_set_handles.size()); ++i)
 373                         if(descriptor_set_handles[i]!=last->descriptor_set_handles[i])
 374                         {
 375                                 unapplied |= PipelineState::UNIFORMS;
 376                                 break;
 377                         }
 378                 if(self.viewport!=last_ps.viewport)
 379                         unapplied |= PipelineState::VIEWPORT;
 380                 if(self.scissor!=last_ps.scissor)
 381                         unapplied |= PipelineState::SCISSOR;
 382         }
 383
 384         if(unapplied&PipelineState::SHPROG)
 385                 vk.CmdBindPipeline(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, handle);
 386
 387         if(unapplied&PipelineState::VERTEX_SETUP)
 388                 if(const VertexSetup *vs = self.vertex_setup)
 389                 {
 390                         vk.CmdBindVertexBuffers(command_buffer, 0, vs->n_bindings, vs->buffers, vs->offsets);
 391                         VkIndexType index_type = static_cast<VkIndexType>(get_vulkan_index_type(vs->get_index_type()));
 392                         vk.CmdBindIndexBuffer(command_buffer, vs->get_index_buffer()->handle, 0, index_type);
 393                 }
 394
 395         if(!self.uniform_blocks.empty())
 396         {
 397                 const PipelineState::BoundUniformBlock &first_block = self.uniform_blocks.front();
 398                 if(first_block.used && first_block.binding==ReflectData::PUSH_CONSTANT)
 399                 {
 400                         const UniformBlock &pc_block = *first_block.block;
 401                         vk.CmdPushConstants(command_buffer, self.shprog->layout_handle, self.shprog->stage_flags,
 402                                 pc_block.get_offset(), pc_block.get_data_size(), pc_block.get_data_pointer());
 403                 }
 404         }
 405
 406         if((unapplied&PipelineState::UNIFORMS) && !descriptor_set_handles.empty())
 407         {
 408                 vector<uint32_t> dynamic_offsets;
 409                 dynamic_offsets.reserve(self.uniform_blocks.size());
 410                 for(const PipelineState::BoundUniformBlock &u: self.uniform_blocks)
 411                         if(u.used && u.binding>=0)
 412                         {
 413                                 if(u.buffer->get_usage()==STREAMING)
 414                                         dynamic_offsets.push_back(frame*u.buffer->get_size());
 415                                 else
 416                                         dynamic_offsets.push_back(0);
 417                         }
 418
 419                 vk.CmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, self.shprog->layout_handle,
 420                         0, descriptor_set_handles.size(), descriptor_set_handles.data(), dynamic_offsets.size(), dynamic_offsets.data());
 421         }
 422
 423         if(unapplied&(PipelineState::VIEWPORT|PipelineState::SCISSOR))
 424         {
 425                 Rect fb_rect = self.framebuffer->get_rect();
 426
 427                 if(unapplied&PipelineState::VIEWPORT)
 428                 {
 429                         Rect viewport_rect = fb_rect.intersect(self.viewport);
 430                         VkViewport viewport = { };
 431                         viewport.x = viewport_rect.left;
 432                         viewport.y = viewport_rect.bottom;
 433                         viewport.width = viewport_rect.width;
 434                         viewport.height = viewport_rect.height;
 435                         if(negative_viewport)
 436                         {
 437                                 viewport.y += viewport.height;
 438                                 viewport.height = -viewport.height;
 439                         }
 440                         viewport.minDepth = 0.0f;
 441                         viewport.maxDepth = 1.0f;
 442                         vk.CmdSetViewport(command_buffer, 0, 1, &viewport);
 443                 }
 444
 445                 if(unapplied&PipelineState::SCISSOR)
 446                 {
 447                         Rect scissor_rect = fb_rect.intersect(self.scissor);
 448                         VkRect2D scissor = { };
 449                         scissor.offset.x = scissor_rect.left;
 450                         scissor.offset.y = scissor_rect.bottom;
 451                         scissor.extent.width = scissor_rect.width;
 452                         scissor.extent.height = scissor_rect.height;
 453                         vk.CmdSetScissor(command_buffer, 0, 1, &scissor);
 454                 }
 455         }
 456
 457         unapplied = 0;
 458 }
 459
 460 } // namespace GL
 461 } // namespace Msp